Digital frequency divider phase shifter
US5703514A · kind A · utility
3Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1995 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Dec 21, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase shifter using digital counters allows extremely accurate phase shifts. In a parallel circuit arrangement of a number of basic phase shift units, which each includes a dual modulus counter and phase control circuitry for controlling the counter modulus, the outputs of several units are combined in parallel. With the divider ratios of all the dividers of the units consisting of roots of pairwise relatively prime numbers, the total number of phase states is equal to the multiplication of its divider ratios.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.